题目

1.Leonardo da Vinci（1452—1519） 【 】 birds kept in cages in order to have tje pleasure of setting them free.
A.is said to be buying B.is said to have bought
2.We can never expect 【 】bluer sky unless we create 【 】 less polluted word.
A.a;a B.a;the

提问时间：2020-08-10

答案

1.B用被动语态来考查进行时和完成时的区别.这里是“据说达·芬奇曾买过……”而不是正在购买,所以用完成时.2.A考查定冠词和不定冠词的用法.“sky”和“world”都是唯一的东西,所以容易让人错选the.结合句意,其实两个...